Kissing young couple, a man in the prime of his life, an old man and a very old man

Four men of different ages standing in a row side by side. On the left, a young man embracing a lady. Next to him, an adult man with an raised arm. Third in the row, an elderly man dressed in a short cape, wearing a cap, counting on his fingers. Far right, an old man, bent over, leaning on a staff. References to the sexual capabilities of men in different life stages.